- Subjects diagnosed with type 2 diabetes and on stable treatment in a period of 90 days prior to screening with either metformin above or equal to 1500 mg (or maximum tolerated dose), pioglitazone above or equal to 30 mg (or maximum tolerated dose), rosiglitazone above or equal to 4 mg (or maximum tolerated dose) or a combination of either metformin/pioglitazone or metformin/rosiglitazone (doses as for individual therapies). Stable is defined as unchanged medication and unchanged dose